Difference between revisions of "IAC-QDC Measurements"
(3 intermediate revisions by the same user not shown) | |||
Line 146: | Line 146: | ||
|- | |- | ||
|6529 || shutter close 22 Hz ||time:22' and 6"|| [[File:6529_close.png | 100 px]] | |6529 || shutter close 22 Hz ||time:22' and 6"|| [[File:6529_close.png | 100 px]] | ||
+ | |- | ||
+ | |6529 || shutter close 0.028 Hz V_cat = V_gem||3' 12"|| [[File:6532_close.png | 100 px]] | ||
+ | |||
+ | |||
|} | |} | ||
Line 151: | Line 155: | ||
voltage at 2.75, 3.05 kV. | voltage at 2.75, 3.05 kV. | ||
− | Discriminator level at 150 mV, filter amp 6 and fine level 6. | + | Discriminator level at 150 mV, filter amp 6 and fine level 6. att11, 6531 overcharge the QDC. |
+ | |||
{| border="1" cellpadding="4" | {| border="1" cellpadding="4" | ||
Line 157: | Line 162: | ||
|Run Number || notes|| running time || image | |Run Number || notes|| running time || image | ||
|- | |- | ||
− | |6531 || shutter close | + | |6531 || shutter close 25 Hz ||time:10' and 23"|| [[File:6531_close.png | 100 px]] |
|- | |- | ||
|6529 || shutter close 22 Hz ||time:22' and 6"|| [[File:6529_close.png | 100 px]] | |6529 || shutter close 22 Hz ||time:22' and 6"|| [[File:6529_close.png | 100 px]] | ||
|} | |} |
Latest revision as of 23:19, 28 October 2013
09/18/13
Detector voltage is 2.8, 3.4 kV for cathode and GEM. filter Amp. (x4 level 6) is used for amplify the GEM's output, ch#5 is used as an ADC input and ch# 31 in TDC
Run Number | Start time | End time | Notes | |
6075 | 12:39:16 | 13:19:33 | shutter open | ![]() ![]() |
6077 | 13:34 :37 | 14:19:05 | shutter close, pmt is connected to ch#11 qdc and ch#27 tdc | ![]() ![]() ![]() |
10/03/13
Detector voltage is 2.8, 3.4 kV for cathode and GEM. filter Amp. (x2 level 6) is used for amplify the GEM's output, ch#5 is used as an ADC input.
10/04/13
Measurement settings, amp. 1x 50 ns differentiation, discriminator's threshold is 100 mV, so the signal is 100 mV and noise is 30 mV.
discriminator's threshold is lowered to 73 mV to the measure the noise charge on the ADC.
Run Number | Start time | End time | Notes |
6226 | 16:34:09 | 16:46:44 | shutter close V_GEM= V_cat ![]() |
6227 | 16:52:39 | 16:58:07 | n= 0.00304878 shutter open V_GEM= V_cat discriminator's threshold decreased to 57 mV ![]() |
6228 | 17:12:06 | 17:26:24 | shutter open V_GEM=2.8 kV V_cat = 3.4 kV ![]() |
6229 | 17:30:25 | 17:48:58 | shutter close V_GEM=2.8 kV V_cat = 3.4 kV 100 px |
6230 | 17:53:11 | 17:48:58 | shutter close V_GEM=2.8 kV V_cat = 3.4 kV gate changed from 300 ns to 2 us , 0 differentiation overflow |
6231 | 17:53:11 | 17:48:58 | shutter close V_GEM=2.8 kV V_cat = 3.4 kV attenuated 6 dB |
6232 | 18:01:03 | 17:48:58 | shutter close V_GEM=2.8 kV V_cat = 3.4 kV threshold increased from 100 mV to 150 mV |
6232 | 18:06:06 | 17:48:58 | shutter close V_GEM=2.8 kV V_cat = 3.4 kV att. 6dB to 2 dB |
6235 | 18:10:54 | 18:15:27 | shutter close V_GEM=2.8 kV V_cat = 3.4 kV att. 6dB |
6236 | 18:18:51 | 18:22:37 | shutter open V_GEM=2.8 kV V_cat = 3.4 kV att. 6dB for the last two runs the figure does not show any difference
|
10/05/13
Measurement settings, amp. 1x ,intergrate 100 ns, discriminator's threshold is 100 mV, so the signal is 100 mV and noise is 30 mV.
discriminator's threshold is lowered to 73 mV to the measure the noise charge on the ADC.
10/07/13
Measurement settings, amp. 2x ,differentiate 50 ns, discriminator's threshold is 107 mV.
10/28/13
voltage at 2.7, 3.0 kV.
Discriminator level at 150 mV, filter amp 6 and fine level 6.
10/28/13
voltage at 2.75, 3.05 kV.
Discriminator level at 150 mV, filter amp 6 and fine level 6. att11, 6531 overcharge the QDC.
Run Number | notes | running time | image |
6531 | shutter close 25 Hz | time:10' and 23" | ![]() |
6529 | shutter close 22 Hz | time:22' and 6" | ![]() |